Answer: a+b = -2
B. -2
Because if a = 1 and b = -3 then
(2x+a)(2x+b)=4x^2-4x+ab
Plug in a = 1 and b = -3 into (2x+a)(2x+b) then solve
(2x+a)(2x+b)
= (2x + 1)(2x - 3)
= 4x^2 + 2x - 6x - 3
= 4x^2 - 4x - 3 (so ab = - 3)
Answer:
Step-by-step explanation:
9/2 is the slope. Slope defines how steep is the straight line.
Slope = change in y ÷ change in x
In this model, 9 refers to the vertical distance between two points
and 2 refers to the horizontal distance between two points.
9/2 is a positive slope. It indicates that if 'x' increases, y also increase.
Answer:
T= 6
Step-by-step explanation:
T-5=1
find T
+5 to both sides
T= 6
Answer:
Please write your question properly
Can I solve all questions
Answer:
So the portion of the loan lent at 4% is 21000(0.5955) = $12,505.5
And the portion of the loan lent at 15% is 21000(0.4045) = $8494.5
Step-by-step explanation:
This problem can be solved in several ways. The way I like is as follows.
Ask yourself at what interest would $ 21,000 yield and interest of $ 2,215 in one year ? The equation to solve is:
21000(P) = 2215
P = 0.1055 or 10.55 %
This number is a weighed average of the 4% yield and the 15% yield so the next equation to solve is
10.55 = 4(1 – X) + 15X
Where X is the proportion of the loan given at the indicated interest. So
10.55 = 4 – 4X + 15X
6.55 = 11X
X = 0.5955
1-X = 0.4045
So the portion of the loan lent at 4% is 21000(0.5955) = $12,505.5
And the portion of the loan lent at 15% is 21000(0.4045) = $8494.5